參數(shù)資料
型號： MCRF452
廠商： Microchip Technology Inc.
英文描述： 13.56 MHz Read/Write Passive RFID Device
中文描述： 13.56 MHz讀/寫無源RFID器件
文件頁數(shù)： 25/50頁
文件大?。?/td> 1172K
代理商： MCRF452
2003 Microchip Technology Inc.
DS40232H-page 25
MCRF450/451/452/455
The following figures show the various modulation
patterns of the Fast Read commands (FRR and FRB).
Each command consists of a combination of five gap
pulses within nine possible gap positions. The pulse
width of each gap is 175
μ
s and the total time span of
each command for the nine possible positions is
1.575 ms (175
μ
s x 9 = 1.575 ms).
In the figures, P
mn
represents
m
th gap pulse at
n
th gap
position in the given data packet (symbol).
FIGURE 6-3:
GAP MODULATION PATTERNS FOR FRR, NORMAL SPEED, TSMAX = 1
FIGURE 6-4:
GAP MODULATION PATTERNS FOR FRR, FAST SPEED, TSMAX = 1
(A) TCMAX = 1
(B) TCMAX = 2
(C) TCMAX = 4
1600
200
400
600
800
1000
1200
1400
P11
P22
P33
P44
P56
200
400
600
800
1000
1200
1400
1600
200
400
600
800
1000
1200
1400
1
0.5
0
1
0.5
0
1
0.5
0
P11
P22
P33
P44
P55
P11
P22
P33
P45
P56
(
μ
s)
(
μ
s)
1600
(
μ
s)
(A) TCMAX = 1
(
μ
s)
1600
200
400
600
800
1000
1200
1400
P11
P23
P35
P46
1
0.5
0
P58
(B) TCMAX = 2
(
μ
s)
1600
200
400
600
800
1000
1200
1400
P11
P23
P35
P46
1
0.5
0
P57
(C) TCMAX = 4
(
μ
s)
1600
200
400
600
800
1000
1200
1400
P11
P23
P35
P47
1
0.5
0
P58
相關(guān)PDF資料
PDF描述
MCRF455 13.56 MHz Read/Write Passive RFID Device
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MCP450SB 13.56 MHz Read/Write Passive RFID Device
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